Top 20 NuGet DirectoryWatcher Packages

A fast and reliable, (non blocking!), .NET File/Directory watcher, complete rewrite of FileSystemWatcher to ensure speed/acuracy/reliability/suppress duplicate events
A Win32 Implementation of a DirWatcher, which should avoid typical problems with the native .NET FileSystemWatcher
BassUtils for .Net - argument validators, FileUtils, IDataReader, IDataRecord, ConfigurationLoader, extensions etc.